Replace PPC_FUNC_NAME with ppc::util::FuncName() implementation (learning-process#460)

Author: allnes

modules/core/task/include/task.hpp

@@ -108,33 +108,33 @@ class Task {
   /// @brief Validates input data and task attributes before execution.
   /// @return True if validation is successful.
   virtual bool Validation() final {
-    InternalOrderTest(PPC_FUNC_NAME);
+    InternalOrderTest(ppc::util::FuncName());
     return ValidationImpl();
   }
 
   /// @brief Performs preprocessing on the input data.
   /// @return True if preprocessing is successful.
   virtual bool PreProcessing() final {
-    InternalOrderTest(PPC_FUNC_NAME);
+    InternalOrderTest(ppc::util::FuncName());
     if (state_of_testing_ == StateOfTesting::kFunc) {
-      InternalTimeTest(PPC_FUNC_NAME);
+      InternalTimeTest(ppc::util::FuncName());
     }
     return PreProcessingImpl();
   }
 
   /// @brief Executes the main logic of the task.
   /// @return True if execution is successful.
   virtual bool Run() final {
-    InternalOrderTest(PPC_FUNC_NAME);
+    InternalOrderTest(ppc::util::FuncName());
     return RunImpl();
   }
 
   /// @brief Performs postprocessing on the output data.
   /// @return True if postprocessing is successful.
   virtual bool PostProcessing() final {
-    InternalOrderTest(PPC_FUNC_NAME);
+    InternalOrderTest(ppc::util::FuncName());
     if (state_of_testing_ == StateOfTesting::kFunc) {
-      InternalTimeTest(PPC_FUNC_NAME);
+      InternalTimeTest(ppc::util::FuncName());
     }
     return PostProcessingImpl();
   }

modules/core/util/include/util.hpp

@@ -3,13 +3,12 @@
 #include <cstdint>
 #include <cstdlib>
 #include <memory>
+#include <source_location>
 #include <string>
 #include <string_view>
 
 #include "nlohmann/json_fwd.hpp"
 
-#define PPC_FUNC_NAME __func__
-
 #ifdef _MSC_VER
 #pragma warning(push)
 #pragma warning(disable : 4459)
@@ -27,6 +26,23 @@ using NlohmannJsonTypeError = nlohmann::json::type_error;
 
 namespace ppc::util {
 
+/**
+ * @brief Returns the unqualified name of the current function.
+ *
+ * @param loc Source location, defaults to the current function.
+ * @return Function name without namespaces or parameters.
+ */
+inline std::string FuncName(const std::source_location& loc = std::source_location::current()) {
+  std::string s{loc.function_name()};
+  if (auto p = s.find('('); p != std::string::npos) {
+    s.resize(p);  // drop “(…)”
+  }
+  if (auto p = s.rfind("::"); p != std::string::npos) {
+    s.erase(0, p + 2);  // drop namespaces
+  }
+  return s;
+}
+
 enum GTestParamIndex : uint8_t { kTaskGetter, kNameTest, kTestParams };
 
 std::string GetAbsoluteTaskPath(const std::string& id_path, const std::string& relative_path);